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