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