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