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