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