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