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