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