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