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