One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,5)(4,12)(6,7)(8,10)(9,14)(11,15)(13,16)(17,18)(19,26)(20,23)(21,29)(22,25)(24,30)(27,31)(28,32)(33,34,38,42)(35,40,36,39)(37,41,46,45)(43,48,44,47)(2,7)(3,10)(9,12)(11,16)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,31)(29,30)(33,34)(35,39)(36,40)(37,41)(38,42)(43,47)(44,48)(45,46) involution — undirected(1,3)(2,8)(4,11)(5,7)(6,10)(9,15)(12,13)(14,16)(17,19,22,20)(18,23,25,26)(21,27,30,28)(24,31,29,32)(33,34)(35,39)(36,40)(37,45)(38,42)(41,46)(43,48)(44,47)(1,3)(2,8)(4,11)(5,7)(6,10)(9,15)(12,13)(14,16)(17,20,22,19)(18,23,25,26)(21,28,30,27)(24,31,29,32)(33,35,38,36)(34,39,42,40)(37,43,46,44)(41,47,45,48)(1,4,6,14)(2,9,7,12)(3,11,10,16)(5,13,8,15)(17,21,22,30)(18,24,25,29)(19,27,20,28)(23,31,26,32)(33,36,38,35)(34,40,42,39)(37,44,46,43)(41,48,45,47)(1,5,6,8)(2,3,7,10)(4,13,14,15)(9,11,12,16)(17,18)(19,26)(20,23)(21,24)(22,25)(27,32)(28,31)(29,30)(33,37,38,46)(34,41,42,45)(35,43,36,44)(39,47,40,48)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.