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)(11,15,16,12)(17,18,22,23)(19,21,26,24)(20,28,31,25)(27,32,29,30)(1,2)(3,6)(4,7)(5,8)(9,11)(10,12)(13,16)(14,15)(18,23)(19,26)(25,28)(27,29) involution — undirected(10,14)(12,15)(17,19,22,26)(18,24,23,21)(20,29,31,27)(25,30,28,32)(9,12)(10,11)(13,15)(14,16)(17,19)(18,21)(20,27)(22,26)(23,24)(25,30)(28,32)(29,31) involution — undirected(1,3,5,4)(2,6,8,7)(9,11)(10,12)(13,16)(14,15)(17,20,22,31)(18,25,23,28)(19,27,26,29)(21,30,24,32)(1,4,5,3)(2,7,8,6)(17,21)(18,19)(20,30)(22,24)(23,26)(25,27)(28,29)(31,32)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.