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