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)(11,14)(12,13)(15,16)(17,18,21,24)(19,26,30,23)(20,25,32,22)(27,28,29,31)(1,3,4,8)(2,5,6,7)(17,19,21,30)(18,23,24,26)(20,31,32,28)(22,27,25,29)(10,13)(14,16)(18,24)(19,27)(22,25)(23,28)(26,31)(29,30) involution — undirected(2,6)(5,7)(17,20)(18,25)(19,28)(21,32)(22,24)(23,27)(26,29)(30,31) involution — undirected(3,8)(5,7)(9,11,12,15)(10,14,13,16)(19,29)(20,32)(22,25)(23,28)(26,31)(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.