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