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