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