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