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