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