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