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