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