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)(19,29)(20,25)(21,26)(22,27)(23,28)(24,32)(30,31)(33,34)(35,43)(36,40)(37,47)(38,42)(39,44)(41,45)(46,48) involution — undirected(1,3,7,4)(2,5,8,11)(6,10,16,12)(9,13,14,15)(17,19)(18,24)(20,30)(21,27)(22,31)(23,32)(25,26)(28,29)(33,35,38,44)(34,39,42,43)(36,45,46,37)(40,47,48,41)(2,8)(3,4)(9,14)(10,12)(33,34,38,42)(35,39,44,43)(36,40,46,48)(37,41,45,47)(1,4,7,3)(2,5,8,11)(6,12,16,10)(9,13,14,15)(17,20,23,27)(18,25,28,22)(19,30,32,21)(24,26,29,31)(33,34)(35,39)(36,40)(37,41)(38,42)(43,44)(45,47)(46,48)(1,5)(2,3)(4,8)(6,15)(7,11)(9,12)(10,14)(13,16)(17,21,23,30)(18,26,28,31)(19,27,32,20)(22,24,25,29)(33,36,38,46)(34,40,42,48)(35,37,44,45)(39,41,43,47)(1,6,7,16)(2,9,8,14)(3,10,4,12)(5,13,11,15)(17,22,23,25)(18,27,28,20)(19,31,32,26)(21,29,30,24)(33,37)(34,41)(35,36)(38,45)(39,40)(42,47)(43,48)(44,46)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.