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