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