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