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