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