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