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