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