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