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