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