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