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