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