One vertex per element, one color per generator, with an edge from x to x·s.
(5,6)(7,12)(8,13)(9,18)(10,14)(11,15)(16,19)(17,20)(21,22,26,30)(23,31,34,35)(24,29,25,28)(27,33,36,32)(1,2)(3,4)(5,7,10,16)(6,11,14,20)(8,15,9,17)(12,13,19,18)(21,23,26,34)(22,27,30,36)(24,33,25,32)(28,35,29,31)(2,4)(5,7)(6,12)(8,17)(9,15)(10,16)(11,18)(13,20)(14,19)(22,28)(24,25)(27,35)(29,30)(31,36)(32,33) involution — undirected(5,8,10,9)(6,13,14,18)(7,15,16,17)(11,19,20,12)(21,24,26,25)(22,29,30,28)(23,32,34,33)(27,35,36,31)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.