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