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