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