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