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