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