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