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