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