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