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