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