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