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