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