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