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)(17,18,23,28)(19,20,30,25)(21,26,32,31)(22,29,24,27)(1,3,5,8)(2,6,4,7)(9,10)(11,15)(12,14)(13,16)(17,19)(18,25)(20,28)(21,24)(22,32)(23,30)(26,29)(27,31)(9,11)(10,13)(12,16)(14,15)(17,20,24,31,23,25,22,26)(18,21,29,30,28,32,27,19)(3,8)(6,7)(11,16)(13,15)(17,21)(18,26)(19,22)(20,29)(23,32)(24,30)(25,27)(28,31) involution — undirected(1,4,5,2)(3,7,8,6)(10,14)(13,15)(17,22,23,24)(18,27,28,29)(19,21,30,32)(20,31,25,26)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.