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