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