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