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