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