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