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