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