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