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