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