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