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