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