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)(22,26)(24,27)(28,34)(29,30)(31,36)(33,35)(5,7,10,6)(8,11,15,13)(9,12,17,14)(16,19,20,18)(21,22,27,29,25,30,24,26)(23,31,35,34,32,28,33,36)(2,4)(5,8)(6,11)(7,13)(9,16)(10,15)(12,18)(14,19)(17,20)(21,23)(22,28)(24,33)(25,32)(26,34)(27,35)(29,36)(30,31) involution — undirected(8,15)(11,13)(16,20)(18,19)(22,29)(23,32)(24,27)(26,30)(28,34)(31,36) 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.