One vertex per element, one color per generator, with an edge from x to x·s.
(1,2)(3,12)(4,15)(5,11)(6,10)(7,9)(8,13)(14,16)(18,24)(19,29)(20,22)(21,33)(25,41)(26,34)(27,39)(28,40)(30,32)(31,35)(36,37)(38,42)(43,45)(44,48) involution — undirected(1,3,7,4)(2,8,9,16)(5,14,6,13)(10,15,11,12)(17,18)(19,25)(20,26)(21,34)(22,27)(23,28)(24,33)(29,45)(30,42)(31,48)(32,44)(35,41)(36,40)(37,39)(38,47)(43,46)(1,4,7,3)(2,8,9,16)(5,13,6,14)(10,15,11,12)(17,19,23,32)(18,25,28,44)(20,29,22,30)(21,35,37,31)(24,38,40,43)(26,45,27,42)(33,47,36,46)(34,41,39,48)(2,9)(8,16)(10,11)(12,15)(17,20,23,22)(18,26,28,27)(19,30,32,29)(21,33,37,36)(24,39,40,34)(25,42,44,45)(31,47,35,46)(38,41,43,48)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.