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