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