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