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