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