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