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