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