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