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