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