One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,7)(6,12)(8,10)(9,14)(11,15)(13,16)(17,18)(19,25)(20,24)(21,30)(22,26)(23,29)(27,28)(31,32)(33,34)(35,38)(36,39)(37,45)(40,42)(41,48)(43,44)(46,47) involution — undirected(1,3)(2,8)(4,5)(6,11)(7,10)(9,15)(12,13)(14,16)(17,19)(18,23)(20,27)(21,28)(22,29)(24,31)(25,26)(30,32)(33,35,40,39)(34,38,42,36)(37,43,48,47)(41,46,45,44)(2,4)(3,10)(9,12)(11,16)(17,20,22,30)(18,21,26,24)(19,27,29,32)(23,28,25,31)(33,36,40,38)(34,35,42,39)(37,46,48,44)(41,47,45,43)(1,4,7,2)(3,5,10,8)(6,12,14,9)(11,13,16,15)(17,20)(18,24)(19,27)(21,26)(22,30)(23,31)(25,28)(29,32)(33,37,40,48)(34,41,42,45)(35,43,39,47)(36,44,38,46)(1,5)(2,3)(4,10)(6,13)(7,8)(9,11)(12,16)(14,15)(17,19)(18,25)(20,27)(21,31)(22,29)(23,26)(24,28)(30,32)(33,38,40,36)(34,35,42,39)(37,46,48,44)(41,43,45,47)(1,6,7,14)(2,9,4,12)(3,11,10,16)(5,13,8,15)(17,21,22,24)(18,20,26,30)(19,28,29,31)(23,27,25,32)(33,39,40,35)(34,38,42,36)(37,47,48,43)(41,46,45,44)A Cayley diagram is a choice, not a fact about the group. Another drawing of this group — in a book, or on a different generating set — may look nothing like this one.