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