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