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