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