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