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