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