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