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