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