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