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