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