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