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