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