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