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