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