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