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