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