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