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