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