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)(20,28)(24,29)(26,32)(30,31)(33,34)(35,40)(36,42)(37,47)(38,44)(39,41)(43,45)(46,48) involution — undirected(2,7)(3,9)(10,13)(11,16)(17,18)(19,23)(20,24)(21,22)(25,27)(26,30)(28,29)(31,32)(33,35,39,44)(34,40,41,38)(36,45,46,37)(42,43,48,47)(2,7)(3,9)(10,13)(11,16)(18,22)(23,25)(24,29)(30,31)(34,41)(35,44)(36,46)(43,47) involution — undirected(1,3)(2,8)(4,7)(5,11)(6,9)(10,15)(12,13)(14,16)(17,18)(19,25)(20,24)(21,22)(23,27)(26,31)(28,29)(30,32)(33,36,39,46)(34,42,41,48)(35,37,44,45)(38,43,40,47)(1,4,6,8)(2,9,7,3)(5,12,14,15)(10,16,13,11)(17,19)(18,23)(20,26)(21,27)(22,25)(24,30)(28,32)(29,31)(33,37)(34,43)(35,36)(38,42)(39,45)(40,48)(41,47)(44,46)(1,5,6,14)(2,10,7,13)(3,11,9,16)(4,12,8,15)(17,20)(18,24)(19,26)(21,28)(22,29)(23,30)(25,31)(27,32)(33,38)(34,35)(36,43)(37,42)(39,40)(41,44)(45,48)(46,47)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.