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