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