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