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