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