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