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