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