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