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