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