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