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