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