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)(19,24,22,36)(20,30,32,38)(21,33,35,26)(25,37,41,28)(29,42,34,39)(31,45,47,44)(40,43,48,46)(2,5)(3,7)(9,10)(11,15)(12,14)(13,16)(17,19,23,22)(18,24,27,36)(20,28,32,37)(21,34,35,29)(25,38,41,30)(26,42,33,39)(31,46,47,43)(40,44,48,45)(9,11)(10,13)(12,16)(14,15)(17,20,23,32)(18,25,27,41)(19,28,22,37)(21,31,35,47)(24,38,36,30)(26,40,33,48)(29,43,34,46)(39,45,42,44)(1,3,4,7)(2,6,5,8)(10,14)(11,16)(17,21)(18,26)(19,29)(20,31)(22,34)(23,35)(24,39)(25,40)(27,33)(28,43)(30,44)(32,47)(36,42)(37,46)(38,45)(41,48)(2,5)(6,8)(10,14)(13,15)(21,35)(26,33)(29,34)(31,47)(39,42)(40,48)(43,46)(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.