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