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