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