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