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