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