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)(19,28)(20,24)(21,26)(22,27)(23,32)(25,37)(29,30)(31,43)(33,35)(34,44)(36,42)(38,45)(39,46)(40,47)(41,48) involution — undirected(1,3)(2,7)(4,11)(5,14)(6,12)(8,15)(9,10)(13,16)(17,18)(19,29)(20,33)(21,25)(22,27)(23,32)(24,35)(26,37)(28,30)(31,40)(34,39)(36,41)(38,45)(42,48)(43,47)(44,46) involution — undirected(17,19,22,30)(18,23)(20,34,36,31)(21,32,37,45)(24,40)(25,28)(26,29)(27,38)(33,43)(35,47,48,46)(39,42)(41,44)(1,4,6,5)(2,8,9,13)(3,11,12,14)(7,15,10,16)(19,30)(23,38)(28,29)(31,34)(32,45)(39,40)(43,44)(46,47)(1,5,6,4)(2,8,9,13)(3,11,12,14)(7,16,10,15)(17,20,21,35,22,36,37,48)(18,24,26,33,27,42,25,41)(19,31,32,46,30,34,45,47)(23,39,29,44,38,40,28,43)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.