One vertex per element, one color per generator, with an edge from x to x·s.
(1,2,4,6)(3,5,7,8)(9,10,12,14)(11,13,15,16)(17,18,23,27)(19,21,30,24)(20,31,29,25)(22,32,28,26)(1,3,4,7)(2,5,6,8)(9,11,12,15)(10,13,14,16)(17,19,23,30)(18,24,27,21)(20,22,29,28)(25,32,31,26)(1,2)(3,5)(4,6)(7,8)(10,14)(11,15)(17,20,23,29)(18,25,27,31)(19,28,30,22)(21,32,24,26)(9,11,12,15)(10,13,14,16)(17,21)(18,19)(20,32)(22,31)(23,24)(25,28)(26,29)(27,30)(1,3)(2,5)(4,7)(6,8)(9,11)(10,13)(12,15)(14,16)(17,19)(18,21)(20,28)(22,29)(23,30)(24,27)(25,32)(26,31) involution — undirected(1,2)(3,5)(4,6)(7,8)(9,10)(11,13)(12,14)(15,16)(17,22,23,28)(18,26,27,32)(19,29,30,20)(21,31,24,25)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.