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