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