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