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