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