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