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