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)(19,28,31,39)(20,25,33,40)(21,27,22,34)(24,35,38,30)(29,44,47,43)(32,41,36,42)(37,45,48,46)(1,3)(2,6)(4,11)(5,9)(7,15)(8,13)(10,12)(14,16)(17,19)(18,24)(20,29)(21,30)(22,35)(23,31)(25,37)(26,38)(27,39)(28,34)(32,45)(33,47)(36,46)(40,48)(41,44)(42,43) involution — undirected(3,9)(6,13)(10,11)(14,15)(17,20)(18,25)(19,29)(21,32)(22,36)(23,33)(24,37)(26,40)(27,41)(28,43)(30,45)(31,47)(34,42)(35,46)(38,48)(39,44) involution — undirected(1,4,5,12)(2,7,8,16)(3,10,9,11)(6,14,13,15)(18,26)(24,38)(25,40)(27,34)(28,39)(37,48)(41,42)(43,44)(2,8)(6,13)(7,16)(14,15)(17,21,23,22)(18,27,26,34)(19,30,31,35)(20,32,33,36)(24,39,38,28)(25,41,40,42)(29,45,47,46)(37,44,48,43)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.