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