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