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