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