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