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