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