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