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