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