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