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