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