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